Keep one record for each session.

Record the start time, duration when you know it, and measured output with its unit. If you measure each side separately, keep those amounts with the same session. A short note can explain a pause, a shorter session or an amount entered later.

Choose a consistent way to describe output. If you write the combined amount and the side amounts, make clear that the sides are parts of the total. Otherwise, you may add the same milk twice when looking back.

Leave a missing amount blank. A timed session without a measurement still tells you that you pumped. It does not establish that the output was zero. When you can recover a forgotten measurement, add it to the original session.

Read the total and the side amounts together.

Suppose a session records 45 mL from the left and 35 mL from the right. Its combined output is 80 mL, with the two side amounts already included. Use that combined amount when adding sessions, rather than adding the sides again.

You may want to compare a particular time of day or find the note from a session that felt different. Start with that question and read the relevant entries. A change in a recorded amount does not, by itself, tell you its cause.

Keep expressed milk separate from bottles given.

A pumping record describes milk expressed during that session. A bottle record describes a feed given to your baby. They may happen on different dates, and a bottle may contain milk expressed earlier.

For that reason, a day’s pumping output minus its bottle amounts is not a complete freezer or fridge inventory. Storage, transfers and milk used on another day may be outside those records. If you also keep a storage list, give it its own purpose and reconcile it separately.

When you want support with pumping, bring the session details and your notes. They can help you describe what you observed. A clinician or qualified feeding professional can help you interpret concerns about supply, comfort or feeding.

Keep the session and output in Diaper Days.

Diaper Days lets you time a Pump session and record its output, including side amounts. You can also add a completed session when you know the times and measurements. Save a note for context you want to return to.

Pump entries stay with your child’s history, alongside the feeds and care events you are already recording. If you notice an incorrect time or amount later, open that saved session and correct it there.

Compare output with the sessions behind it.

Diaper Days Insights shows recorded Pump output, pumping duration, session counts and output per pump. Compare the same dates across those charts. A change in the total may look different once you can see how many sessions you recorded.